:root{font-family:Segoe UI,Tahoma,sans-serif;color:#1a1a1a;background:#f5f7fb}*{box-sizing:border-box}body{margin:0}.app{max-width:860px;margin:0 auto;padding:20px;display:grid;gap:14px}.panel{background:#fff;border:1px solid #e1e6ef;border-radius:10px;padding:14px}.actions{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:8px}button{background:#0f5ae0;color:#fff;border:none;border-radius:8px;padding:8px 14px;cursor:pointer}button:disabled{opacity:.55;cursor:default}select,input[type=file]{padding:8px;border:1px solid #c9d2e2;border-radius:8px;background:#fff}.warning{color:#9a3f00;font-weight:600}